The Subaru Boxxer engine has a very recognizeable exhaust tone. So much that you could probably say, “thats a STI”, from a mile a away. Many different companies make an exhaust for the Subaru WRX and STI chassis since the car came to the USA shores back in 2002. So we scowered YouTube looking for a couple of our favorite exhaust clips and put them together to see, “Which Exhaust Sounds the Best!” These are not our videos so excuse the quality or shots, but they give a great comparison between the different models. The exhausts we have put in our sound competition are: Agency Power, Greddy EVO3, Invidia N1, HKS, Tomei, and Cobb Tuning catback systems. Check out the video below and see the descriptions of each exhaust we looked at! Shop all Subaru WRX and STI Exhausts here.
Agency Power STI Sedan Catback Exhaust – Agency Power has developed one of the best sounding and performing exhaust systems for the 2011 STi Sedan. The new exhaust features an all T304 stainless steel piping in 3inch diameter from the catback. The piping is all hand polished featuring robotic TIG welding. The midpipe includes a resonator to assist in keeping that traditional boxxer engine sound with an exotic race tone touch that does not drone in the cabin. The ½ inch thick flanges offer a secure fit along with the factory placement exhaust hangers. The catback exhaust uses a high flow Y-Pipe to efficiently direct exhaust to the dual exhaust canisters. The Y-pipe features a merged collector and 3 inch piping on each extension to give your exhaust a combined 5 inches of exhaust flow. The straight through mufflers are designed to optimize horsepower with very little restriction. The catback exhaust features quad 3.5 inch tips with the Agency Power logo. As tested on a Mustang all wheel drive dyno, the Agency Power catback exhaust made an impressive 17 all wheel horsepower and 28ft/lbs of torque. The exhausts are available for 2011-2015 STi WRX Sedans.
Greddy EVO3 Catback Exhaust – Building on the ever-popular Evolution line, we are proud to introduce the GReddy Evo3, Evolution Exhaust System. The Evo3 was designed to provide the best combination of Performance and Sound. Retaining the same Evo muffler style and effective off-set Tip combination, the new Evo3 muffler overall diameter is now 10% smaller, but maintains effective sound suppression with a classic GReddy Evo sound. Each vehicle application is carefully studied and designed with larger piping diameters to maintain proper routing and flow for power, throaty sound at wide-open throttle and precise fitment and functional style.
Invidia Dual N1 Catback Exhaust – For a good balance of price and performance, Invidia offers the motorsports enthusiasts a strong line up of Invidia N1 Exhausts that are constructed with high quality SUS304 stainless steel, CNC machined flanges, and manufactured with a polished finish. Each system features mandrel-bent stainless steel piping for maximum exhaust flow and reduced back pressure. These exhausts are engineered to produce strong mid to top end power gains, as well as an increase in horsepower and torque.
HKS 2011 Subaru Impreza WRX STi Sedan ES Premium Exhaust
Details:
65mm Piping
115mm Tips
304 Stainless Steel with High Polish
Robotic Welds
Tomei STI Sedan Catback Exhaust – When aiming for true performance efficiency, we had chosen to design the exhaust with the least amount of bends as possible. Just like the true purpose built race cars, in a racing layout design, yet to still comply with the stock body design so it can be fitted to any street used vehicles.
Cobb Tuning SS 3″ 2011+ WRX / STI Sedan Cat-Back Exhaust – The long awaited COBB Cat-Back Exhaust for the 2011+ Subaru WRX/STi Sedan. This mandrel bent exhaust uses twin straight-through mufflers terminating in beautifully laser-etched 3.5″ quad-tips to make your presence known in the way that only COBB Subaru exhausts can provide. The outstanding craftsmanship and attention to detail are evident in every aspect of this gorgeous cat-back.
